Answer the following questions with F F or Hfr More than one
     Answer the following questions with F^+, F^-, or Hfr. More than one of these three may apply to a single question.  Bacterium that does not have an F factor.  Bacterium that can donate an F factor.  Bacterium that has an integrated F factor.  Bacterium that can receive an F factor.  Bacterium that forms a sex pilus. 
  
  Solution
(a) F- cell
(b) F+ cell, Hfr
(c) Hfr
(d) F- cell
(e) Hfr, F+
F+ Cells: These are the bacterial cells which contains the F plasmid.
F- cells are the cells without F plasmid.
F+ plasmid when integrated into the genomic DNA of bacteria it is termed as Hfr cell

